US2801170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of color former dispersions
Assignee: Eastman Kodak Co
•
Filing: 1954-12-20
•
Granted: 1957-07-30
•
Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Paul W Vittum
- 👤 Donald B Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A GELATINO-SILVER HALIDE EMULSION WHICH COMPRISES MIXING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, WITH A LOW BOILING WATER-INSOLUBLE ORGANIC SOLVENT FOR THE COLOR-FORMING COMPOUND SAID LOW-BOILING SOLVENT HAVING A BOILING POINT BELOW 125* C., DISPERSING THE SOLUTION OF COLOR-FORMING COMPOUND AND LOW BOILING ORGANIC SOLVENT IN GELATIN, DRYING SAID DISPERSION TO REMOVE SUBSTANTIALLY ALL ORGANIC SOLVENT, SEPARATELY DISPERSING IN GELATIN A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC CRYSTALLOIDAL MATERIAL HAVING A BOILING POINT ABOVE 175* C., SAID ORGANIC CRYSTALLOIDAL MATERIAL HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND BEING PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, AND THEN MIXING SAID DISPERSION OF COLOR-FORMING COMPOUND AND SAID DISPERSION OF ORGANIC CRYSTALLOIDAL MATERAIL, WITH A GELATINO-SILVER HALIDE EMULSION TO FORM A DISPERSION IN THE EMULSION OF LIQUID PARTICLES OF THE COLORFORMING COMPOUND AND THE ORGANIC CRYSTALLOIDAL MATERIAL.
Claim 2
Independent Claim
159 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A GELATINO-SILVER HALIDE EMULSION WHICH COMPRISES MIXING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, WITH A LOW BOILING WATER-INSOLUBLE ORGANIC SOLVENT FOR THE COLOR-FORMING COMPOUND SAID LOW-BOILING SOLVENT HAVING A BOILING POINT BELOW 125* C., DISPERSING THE SOLUTION OF COLOR-FORMING COMPOUND AND LOW BOILING ORGANIC SOLVENT IN GELATIN, DRYING SAID DISPERSION TO REMOVE SUBSTANTIALLY ALL ORGANIC SOLVENT, SEPARATELY DISPERSING IN GELATIN A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC CRYSTALLOIDAL MATERIAL HAVING A BOILING POINT ABOVE 175* C., SAID ORGANIC CRYSTALLOIDAL MATERIAL HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND BEING PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, AND THEN MIXING SAID DISPERSION OF COLOR-FORMING COMPOUND AND SAID DISPERSION OF ORGANIC CRYSTALLOIDAL MATERAIL, WITH A GELATINO-SILVER HALIDE EMULSION TO FORM A DISPERSION IN THE EMULSION OF LIQUID PARTICLES OF THE COLORFORMING COMPOUND AND THE ORGANIC CRYSTALLOIDAL MATERIAL.
References Cited (Backward Citations)
US2322027A
Cited
US2478400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |